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PDF L5957 Data sheet ( Hoja de datos )
| Número de pieza | L5957 | |
| Descripción | Multifunction voltage regulator | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de L5957 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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L5957
Multifunction voltage regulator for car radio
Features
■ Four outputs:
– 8.5 V @ 500 mA
– 5 V @ 300 mA Permanent
– 5 V @ 800 mA
– 3.3 V @ 800 mA
■ 2 A high side driver
■ Reset function
■ Ignition comparator
■ Load dump protection
■ Thermal shutdown
■ Overcurrent limitation
■ All pins ESD protected
Multiwatt15 (Vertical)
PowerSO20 (Slug up)
Description
The L5957 contains a triple voltage regulator and
a power switch.
The IC includes a monitoring circuit for detection.
The IC features a very low quiescent current in
standby.
Table 1.
Device summary
Order code
L5957PD
L5957PDTR
L5957
Package
PowerSO20 (slug up)
PowerSO20 (slug up)
Multiwatt15 (Vertical)
Packing
Tube
Tape and reel
Tube
January 2010
Doc ID 14442 Rev 2
1/16
www.st.com
1
Free Datasheet http://www.datasheet4u.com/
1 page  
L5957
1
Block and pins connection diagrams
Block and pins connection diagrams
Figure 1. Block diagram
VINI (MAIN)
EN_SW
BU
VIN2
ENREG3(5V)
ENREG1-4(8.5V, 3.3V)
POWER
SWITCH
REG1
REG2
REG3
REG4
SW
REG 1(8.5V)
REG 2(PERM)(5V)
REG 3(5V)
REG 4(3.3V)
HOLD
THERMAL DUMP LOAD
PROTECTION PROTECTION
IGNIN
IGNITION
BUFFER
RESET
BUFFER
RES
CRES
Figure 2. Pins connection
IGNOUT
D02AU1342/L5957
VIN2
REG3(5V)
N.C.
REG1(8.5V)
SW
N.C.
VIN1
BU
REG2(5V)
HEATSINK
20 1
19 2
18 3
17 4
16 PowerSO 5
15 6
14 7
13 8
12 9
11 10
D02AU1343 /L5957
REG4(3.3V)
IGNIN
IGNOUT
RES
CRES
ENREG1-4(8.5V, 3.3V)
ENREG3(5V)
EN_SW
HOLD
GND
15
14
13
12
11
10
9
Multiwatt 8
7
6
5
4
3
2
1
VIN2
REG3
REG1
SWITCH
BU
REG2
VIN1
GND
HOLD
EN SW
ENREG1, 4
ENREG3
CRES
RES
REG4
D03AU1513/L5957
Doc ID 14442 Rev 2
5/16
Free Datasheet http://www.datasheet4u.com/
5 Page 
L5957
Figure 6. Backup and reset diagram
VBATT
14
5V PERM
5
4.8
4.7
5
3 CDELAY
RESET
Figure 7. Hold and thermal protection
DUMP
VIN1
22
18
9.5
5
HOLD
TEMPERATURE
PROTECTION
8.5V
REG1(8.5V)
5V
REG2(5V)
5V
REG3(5V)
3.3V
REG4(3.3V)
5V
ENREG3
ENREG1-4
Electrical specifications
BACKUP CAP.
t
t
D02AU1422
t
9V
8.5V
5V
3.3V
ON
T≅160
D02AU1423B
Doc ID 14442 Rev 2
11/16
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet L5957.PDF ] | |
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